(19)
(11) EP 2 021 973 A2

(12)

(88) Date of publication A3:
21.08.2008

(43) Date of publication:
11.02.2009 Bulletin 2009/07

(21) Application number: 07794494.0

(22) Date of filing: 03.05.2007
(51) International Patent Classification (IPC): 
G06K 7/08(2006.01)
(86) International application number:
PCT/US2007/010675
(87) International publication number:
WO 2007/130482 (15.11.2007 Gazette 2007/46)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK RS

(30) Priority: 04.05.2006 US 417768

(71) Applicant: Goliath Solutions LLC.
Deerfield, IL 60015 (US)

(72) Inventors:
  • OVERHULTZ, Gary L.
    River Forest, IL (US)
  • HARDMAN, Gordon E.
    Boulder, CO 80304 (US)
  • MEAD, Robert W.
    Chicago, IL 60602 (US)

(74) Representative: Weber, Martin 
Jones Day Prinzregentenstrasse 11
80538 München
80538 München (DE)

   


(54) DISTRIBUTED RFID ANTENNA ARRAY UTILIZING CIRCULAR POLARIZED HELICAL ANTENNAS